ReturnBook.java
~~~
package zyw.admin;
import zyw.tools.DataBase;
import javax.swing.*;
import javax.swing.table.DefaultTableModel;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Date;
import java.util.Vector;
public class ReturnBook extends JPanel implements ActionListener {
DataBase db;
String sql;
String str;
//创建分割方向为上下的JSplitePane对象
private JSplitPane jsp=new JSplitPane(JSplitPane.VERTICAL_SPLIT,true);
//创建JPanel对象
private JPanel jpt=new JPanel();
private JPanel jpb=new JPanel();
//创建按钮数组
private JButton[] jbArray=new JButton[]
{
new JButton ("挂失"),
new JButton ("归还"),
new JButton ("确定")
};
private JLabel jl=new JLabel("请输入你的学号:");
private JTextField jtxt=new JTextField();
//创建标题
Vector<String> head = new Vector<String>();
{
head.add("书号");
head.add("学号");
head.add("借阅时间");
head.add("还书时间");
head.add("是否过期");
head.add("是否预约");
}
//
Vector<Vector> data=new Vector<Vector>();
//创建表格模型
DefaultTableModel dtm=new DefaultTableModel(data,head);
//创建Jtable对象
JTable jt=new JTable(dtm);
//将JTable封装到滚动窗格
JScrollPane jspn=new JScrollPane(jt);
public ReturnBook()
{
this.setLayout(new GridLayout(1,1));
//设置整个RetrunBook界面上下部分均为空布局管理器
jpt.setLayout(null);
jpb.setLayout(null);
//设置Label的大小及位置
jl.setBounds(5,15,100,20);
//将Jlabel添加到jpt面板上
jpt.add(jl);
//为JTextField设置大小及位置
jtxt.setBounds(105,15,300,20);
//把JTextField添加到jpt
jpt.add(jtxt);
//设置JBuuton的大小及位置
jbArray[0].setBounds(5,50,100,20);
jbArray[1].setBounds(150,50,100,20);
jbArray[2].setBounds(295,50,100,20);
//添加JButton并给其添加事件监听器
for(int i=0;i<3;i++)
{
jpt.add(jbArray[i]);
jbArray[i].addActionListener(this);
}
//把jpt设置到jsp的上部窗格
jsp.setTopComponent(jpt);
jsp.setBottomComponent(jspn);
jsp.setDividerSize(4);
this.add(jsp);
//设置jsp中分割条的初始位置
jsp.setDividerLocation(80);
//设置窗体的大小位置及可见性
this.setBounds(10,10,800,600);
this.setVisible(true);
}
public void loseBook(int row){
String bname="";
int lbno=0;
int bno=Integer.parseInt((String)jt.getValueAt(row,0));//得到丢失书的书号
String sno=(String)jt.getValueAt(row,1);//得到丢失书的人学号
sql="select BookName from BOOK where BookNO="+bno;
db=new DataBase();
//找到最大的丢失记录号
sql="select MAX(LbNO) from LoseBook";
sql="insert into LOSEBOOK values("+lbno+","+sno+","+bno+",'"+bname+"')";//向丢书记录表中插入记录
sql="select BookNo from ORDERREPORT where BookNO="+bno;//检查预约表中是否预约该书，若有，删除
sql="select BookNo from EXCEEDTIME where BookNO="+bno;//检查超期表中是否有该书，若有，删除
sql="delete from RECORD where BookNO="+bno;//从借书表中将丢失图书的记录删除
sql="delete from BooK where BookNo="+bno;//从图书表中将丢失的书删除
int i=0;
if(i>0){//提示挂失成功
JOptionPane.showMessageDialog(this,"恭喜你，挂失成功!!!","消息",
JOptionPane.INFORMATION_MESSAGE);
return;
}
else{//提示挂失失败
JOptionPane.showMessageDialog(this,"对不起，挂失失败!!!",
"信息",JOptionPane.INFORMATION_MESSAGE);
return;
}
}
public void updateTable(){//实现界面下部表格的更新
sql="select * from RECORD where StuNO="+jtxt.getText().trim();
db=new DataBase();
Vector<Vector> vtemp = new Vector<Vector>();
jt.clearSelection();
dtm.setDataVector(vtemp,head);//更新table
jt.updateUI();
jt.repaint();
}
public int checkTime(int sno,int bno)
{//-1代表超期没交罚款 0代表当天借的书 1代表正常还的书 -2表示超期交罚款
int day=0;
int flag=0;
String bname="";
Date now=new Date();
String returntime="";
sql="select ReturnTime from RECORD where StuNO="+sno+" and BookNO="+bno;
db=new DataBase();
String[] strday=returntime.split("\\.");//这里使用了简单的正则式，规定了时间的格式
int ryear=Integer.parseInt(strday[0].trim());
int rmonth=Integer.parseInt(strday[1].trim());
int rday=Integer.parseInt(strday[2].trim());
day=(now.getYear()+1900-ryear)*365+(now.getMonth()+1-rmonth)*30+(now.getDate()-rday);
if(day==-30)
{//表示当天借的书
JOptionPane.showMessageDialog(this,"今天借的书不能还！！！",
"消息",JOptionPane.INFORMATION_MESSAGE);
flag=0;
}
else if(day>0)
{//代表超期了
int i=JOptionPane.showConfirmDialog(this,"该书已过期,应交罚款为"
+day*0.1+"元,是否缴纳罚款?","消息",JOptionPane.YES_NO_OPTION);
if(i==JOptionPane.YES_OPTION){
JOptionPane.showMessageDialog(this,"你已成功交费"+day*0.1+"元",
"消息",JOptionPane.INFORMATION_MESSAGE);
flag=-2;
}
else
{//超期且没交费
flag=-1;
sql="select BookName from BOOK where BookNO="+bno;
sql="insert into EXCEEDTIME(StuNO,BookNO,BookName,DelayTime) values("+sno+","+bno+",'"+bname+"',"+day+")";
}
}
else
{//表示可以正常归还的书
flag=1;
}
return flag;
}
public static void main(String[] args)
{
new ReturnBook();
}
@Override
public void actionPerformed(ActionEvent e) {
if(e.getSource()==jbArray[2]){//事件源为"确定"按钮
if(jtxt.getText().trim().equals("")){//学号输入为空，提示
JOptionPane.showMessageDialog(this,"请输入学号",
"消息",JOptionPane.INFORMATION_MESSAGE);
return;
}
else{//根据学号进行查询
sql="select * from RECORD where StuNO="+jtxt.getText().trim();
db=new DataBase();
Vector<Vector> vtemp = new Vector<Vector>();
}
}
if(e.getSource()==jbArray[1]){//当要归还图书
int row=jt.getSelectedRow();
if(row<0){//如果未选中下部表中的某些内容，进行提示
JOptionPane.showMessageDialog(this,"请选择要归还的书!!!","消息",
JOptionPane.INFORMATION_MESSAGE);
return;
}
str=(String)jt.getValueAt(row,0);//得到书号
int sno=Integer.parseInt((String)jt.getValueAt(row,1));
int bno=Integer.parseInt(str);
int flag=checkTime(sno,bno); //判断是否超期
if(flag==-1){//如果图书超期，则将取消该同学的借书权限
db=new DataBase();
sql="update student set permitted='否' where StuNO="+sno;
}
if(flag==0){return;}//如果图书未超期，则进行归还操作
sql="Delete from RECORD where BookNO="+Integer.parseInt(str);
db=new DataBase();
sql="update book set borrowed='否' where BookNO="+Integer.parseInt(str);
updateTable();
}
if(e.getSource()==jbArray[0]){//需要挂失图书
int row=jt.getSelectedRow();
if(row<0){
JOptionPane.showMessageDialog(this,"请选择要挂失的书!!!","消息",
JOptionPane.INFORMATION_MESSAGE);
return;
}
loseBook(row);
updateTable();
}
}
}
~~~
